Hint: With a somewhat slight physique, this apparel all-star found his inspiration on the football field, where he wanted all the help he could get. Legend has it that while on his college team, he grew frustrated with his bulky cotton undergarments and developed the idea for sports apparel that would wick away moisture. The company he founded broke the billion-dollar mark in revenue this year.

Last updated October 24 2011: 2:34 PM ET
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They're the hottest young stars in business across the globe. They're innovators, disrupters, and job creators; in fact, it's a pretty safe bet you're going to be working for them someday -- if you aren't already!